Relay Wiring for Dummies????

I've got a pair of standard type relays. I would like to install them in my pickup for the headlights. I understand Ford pickup headlights are wired through the switch. I converted my '71 to the new style lights with repalceable bulbs and have been told to use the relays.

I'm not a wiring genius (guess you figured that out by now) and have a couple left over relays that came with some door solenoids. I put a remote entry system and that came with it's own relays and thes are leftovers. Will they work for headlights, and how do I wire them in?

Thanks for the help.

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standard relays have 4 pins, I assume that is what you have Dave. One for 12v source, one for ground, one to send power to load, and one signal to activate the relay that comes from the switch. The relay logic should be printed on your relays. Got a pic?

Those, without a doubt, are excellent diagrams. Just be aware that last diagram is using SPDT relays. With SPST relays terminals 87 and 87a are at the same electrical point (They are internally connected) while on SPDT relays those two terminals are separate.
I had to use SPDT relays when I wired the door lock switches to use the alarm system on my Dakota. I couldn't find them at any of the auto parts stores here in Springfield, but the car audio stores carried them.

Ken Thomas
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Double check relays when purchased. Some of the Bosches are only rated at 15 amps. If you wanna go hog wild with amperage, you will need to go higher. Dave stated that he has some spares, so I think he'll double check the amp ratings.

Those, without a doubt, are excellent diagrams. Just be aware that last diagram is using SPDT relays. With SPST relays terminals 87 and 87a are at the same electrical point (They are internally connected) while on SPDT relays those two terminals are separate.
I had to use SPDT relays when I wired the door lock switches to use the alarm system on my Dakota. I couldn't find them at any of the auto parts stores here in Springfield, but the car audio stores carried them.

So SPDT relays can be used to wire the door lock actuator. Good info and good to know that. Thanks

Summit actually has some relay wiring diagrams on their website. When I was wiring my car I added several - but for the life of me, could not figure them out. It took me hours to understand the principle, and almost a year later - pretty much ---- gone